Crankcase drain valve



Jan. 16, 1940. R H N|CH0LS i 2,187,247

cRANKcAsE DRAIN VALVE l Filed Jan. 25, 1939 IINVENTOR ATTORNEYS 65 gasket I2 which engagesfthe wall of the openand remove the plug I0 from within the opening 55 `1 PatentedJaL i i ,t i i i,

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` ACRANKCASEDVRAIN VALVE `fRussell Nichols, Rochester, Minn. r Application January 25,1939-, serial No. 252,815

` l 2 clanes. ioiliisviss) lVIy invention relates to new and usefulwirn` ing 9 to form a tight t therewith to preclude i, movements in valves" and` more particularly to leakage of oil from said crankcasegaLocated cencrankcase drain valves;` l 1 i trally within said plug, adjacent the outer end -Ieretofore, crankcases have been commonly thereof, is aball I3 formed with flat sides I4 constructed with drainoutlets disposed centrally t0 `preclude lateral movement of said ball relaof the bottomwallfthereof orlin said bottom wall tive to said plug.` Adjacent the inner end of the adjacent one ofthe side walls and `said outlets said ball, the plug is fashioned with a recess I 4a are usuallyfClOSed blmneans 0f a SGI'BW plllghaving positioned therein a spring I5 engaging In constructions of this character it is necesthe inner end of Said ball for preventing move- 10 Sary to remove the Screw plus from a position ment of the plug relative te the ball when said 10 under the crankcaseinrorderthatsaid crankcase plug is disengaged from the seat as hereinafter may be drained and which operation isattended more fully set forth. i

by Various disadvantages. The outer end of the ball has fashioned there- It iS therefore One 0f the Principal ObjeQtS 0f` on the lower end of an arcuate shaped arm I6,

my invention to provide 1a crankcase for motors I theupper end of which is pivotally connected 15 in which the drain plug is notrso disposedwith to thelower end of a rod I1. The upper end respect to `the bottom wall thereof. i of the rod I1 has xed thereon a piston I8 oper- Another Object 0f mYinVentiOn iS to provide a able in a casing I9, the lower end of said casing new and novel meansfor closing thedrain openbeing fashioned with a lower end having an p ing...` k opening receiving the rod I'I and said end has 20 All important Object 0f my invention iS t0 proseated thereon the lower end of a coil spring 20. vide controlling means for fthe drain opening, The upper end of the coil spring engages the ,r which controlling means is capable of operation lower face of the piston I8 and normally urges 1 from a position adjacent the side of themotor said piston upwardly in said casing I9. The

rather than belowthe same as is the common upperl end of the casing has secured thereto a 25 i practice. p `latch `member 2| fashioned onthe upper end Other objectsand advantageswill be apparent with a laterally extending section 22 terminating from the following description, appended claims in a downwardly extending nib 23normal1yseat4 and annexed drawing;` i i y i ed within a keeper24 secured to the side wall 6 ReferringA to the drawing wherein like referof the crankcase. The upper end of the member 30 ence characters designate like parts throughout 2| is also provided with a hand-piece 25 wherethe several views: by to eiect operation of the casing relative to Figure 1 is a fragmentary side elevation of the the piston I8 as hereinafter more fully set forth. lowerportion `of a crankcase illustrating my in,- Between the upper and lower ends, the arm IIi` i venticn as appliedthereto. is pivoted to the outer end of a bracket 2B, the 35 i Figure 2` is amsectional view on an enlarged inner end of which is secured to the side wall scale taken on the line 2-2 of Figure 1. of the crankcase and said bracket serves to effect I Figure 3 is a detail sectional view taken on the pivoting of the arm I6 during operation thereof. line 3-3 of Figure 2. The outer face of the plug I0 has secured there- `4 0` As illustrated in the drawing, there is provided to a plate 21 having a centrally disposed opening 40 `a crankcase Shaving side and bottom walls 6 and receiving the outer end of the ball I3 whereby i i 'l respectively. At the jointure of said side and to maintain said ball in adjusted position within `bottom wallsthere is formed an angularly dis-` the plug. i ,l posedsection 8 havingintegrally fashioned there` In operation; the parts being-in the position with a frustum shaped valve seat formed with a illustrated in Figure 2 of the drawing, the hand-S45 similar shaped opening 9 extending therethrough piece 25 is operated upwardly to move the casi whereby oil may be drained from said crankcjase. ing I9 relative to the piston` I8 and at the same i For `closing the opening 39, I provide a valve time effect disengagement of the nib 23 from ,i member or plug IIJ of a frustum shaped conflgthe keeper 21| by an outward movement relative uration and which is fashioned on the outer end to the wall 6. When the nib 23 is thus disen" 50 with` a circumferentally extending flange I I. gaged from the keeper 24, the upper end of the i The periphery of saidtplug` adjacent the inner arm I 5 is actuated downwardly and serves to x face of said flange is formed with a circumferpivot thelower end thereof outwardly `relative entially extending groovein which is mounted a to the crankcase and at the same time disengage moving the plug-from beneath. the crankcase as is the common practice.

It isI obvious that the invention is not confined to thel hereindescribed use therefor as it may be utilized for any purpose to which it is adaptable. It is therefore to be understood that the invention is not limited to the4 specific construction as illustrated and described, as the same is only illustrative of the principles of operation, which are capable of extended. application in advance formsand that 'the invention comprehends all construction within the vscope of the appended claims.

What Iclaim is: y

1. In combination with a crankcase formed with an angularly disposed drain` opening at the jointure of the'side and bottom Walls of said crankcase, a plug seated in said opening and fashioned with a socket, an arm pivotally connected to said side Walll and having upper and lower ends, a ball carried on said lower end and seated in said socket, and a latch connected to said upper end and engaging a portion of said side wall whereby to maintain said plug in said opening, said latch being disengageable from said side wall to eiect pivoting of said arm to move said plug out of said opening for draining said l crankcase.

2. In. combination with a crankcase formed with an angularly disposed drain opening at the jointure of the side and bottom walls of said crankcase, a plug seated in said opening and fashioned with a socket, an arm pivotally connected to said side wall and having upper and lower ends, a ball carried on said lower end and seated in said socket, a latchconnected to said upper end and engaging a portion of said side wall whereby to maintain said plug in said opening, said latch being disengageable from said side wall to effect pivoting of said arm to move said plug'out of said opening for draining said crankcase, and a spring in said plug and engaging said ball to maintain said plug in adjusted condition relative to said lower end of said arm upon withdrawal from'said opening.

RUSSELL H. NICHOLS. 

